I have a situation that I have to manually sync one disk to the other and keep the copy as fresh as possible. Any (possibly free) software for it?
OS: Windows XP x86
If you have WinXP Pro, you could keep the two disks in a RAID 1 array so they are automatically mirrored on a filesystem level.
XXCLONE appears to be a simple filesystem cloner that doesn't need to work on a disk I/O level (like by booting a live CD). It seems to be free for whole-disk backups, but has the functionality for faster incremental backups if you pay for the Pro version.
DriveImage XML might be another option.